Electrical Wiring - Dunkirk Q90-50 Installation, Operation & Maintenance Manual

WARNING
!
Electrical shock hazard. Turn OFF electrical power
supply at service panel before making electrical
connections. Failure to do so could result in death
or serious injury.
Electrically bond boiler to ground in accordance with
requirements of authority having jurisdiction. Refer to:
• USA- National Electrical Code, ANSI/NFPA 70.
• Canada - Canadian Electrical Code, Part I, CSA C22.1:
Safety Standard for Electrical Installations.
Electric Power Supply
Prior to making any line Voltage connections, turn OFf
electrical power at fuse box.
1.
Run separate 115 Volt circuit from separate over
current protection device in electrical service entrance
panel. This should be 15 ampere circuit.
2. See Figure 20, Page 31
switch junction box and power supply connection
points.
3.
Locate service switch in vicinity of boiler. Verify it is
turned OFF during service or maintenance.
• Connect black (hot) lead from power supply to black
wire labeled L 120 VAC.
• Connect white (neutral) lead from power supply to
white wire labeled N 120 VAC.
• Connect green (ground) lead from power supply to
green wire labeled G 120 VAC.
4.
Run 14 gauge or heavier copper wire from boiler to
grounded connection in service panel or properly driven
and electrically grounded ground rod.
Thermostat Installation
• Thermostat location has important effect on operation
of boiler system.
• Follow instructions included with your thermostat.
• Locate thermostat about fi ve feet above fl oor on inside
wall.
• Mount directly on wall or on vertical mounted outlet
box.
• It should be sensing average room temperature.
Set heat anticipator (where applicable) at 0.7 amps.
Connect 24 Volt thermostat leads to two(2) yellow wires
located in junction box, located on outer jacket of boiler.
See Figure 20, Page 31 for junction box and thermostat
fi eld wiring connections.

ELECTRICAL WIRING

for diagram showing service
Connect Circulator Pump Wiring
See Figure 20, Page 31 for circulator pump fi eld wiring con-
nections.
Supplied 5 foot wiring harness with fl exible metal conduit
for connection from circulator pump to junction box.
If two 120 Volt circulator wire terminals inside junction box
are not used, leave two wire nuts to prevent short circuit.
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and
dangerous operation. Verify proper operation after
servicing.
Things to Avoid when Locating Thermostats
Corners and alcoves
COLD SPOTS:
Concealed pipes or ducts
Stairwells - drafts
Unheated rooms on
other side of wall
30
NOTICE
DEAD SPOTS:
Behind doors
HOT SPOTS:
Concealed pipes
Fireplace
TV sets
Radios
Lamps
Direct sunlight
Kitchens